我们能告诉我们的身体在哪里结束,外部世界在哪里开始吗? 准确的三维内部车身模型的证据
Celia R Blaise1,2, Holly C Clark1, Hannes P Saal1,3
1Active Touch Laboratory, School of Psychology, University of Sheffield, Sheffield S1 4DP, UK.
Proceedings. Biological sciences
|August 12, 2025
概括
我们精确地感知到我们身体的边界,往往在毫米范围内. 然而,准确性因身体部位而异,一些区域在感知中表现出系统的偏差.
科学领域:
- 神经科学是一个神经科学.
- 心理物理学的精神物理.
- 身体上的感觉 (somatosensation) 是一种感觉.
背景情况:
- 准确地感知身体边界对于自我意识和与环境的相互作用至关重要.
- 不同的身体区域之间身体边界感知的精度和变异性尚未得到充分理解.
研究的目的:
- 通过心理物理评估感知到的身体边界的准确性.
- 调查影响身体边界感知的因素,包括解剖学变异,姿势和感官线索.
主要方法:
- 开发了一个心理物理协议,参与者判断触觉刺激的中点与他们感知到的身体边界相对.
- 利用3D扫描来确定客观的解剖边界,并将心理测量功能与感知数据相匹配.
- 操纵姿势和感官信息 (局部3D结构) 以评估它们对边界判断的影响.
主要成果:
- 在多个区域内定位身体边界方面表现出高精度,通常在毫米范围内.
- 确定了准确度的显著变化,在手掌上近乎完美的定位,但系统地高估了手腕边界.
- 显示了感知判断适应姿势,但在没有详细的3D结构信息的情况下会下降,突出了自身感知和身体模型的整合.
- 观察到非平均解剖学个体倾向于依赖典型的身体模型,这表明了自上而下的影响.
结论:
- 身体边界表示将详细的3D解剖模型与自身感知反集成到一个连贯的感知模型中.
- 身体边界的感知非常精确,但受到系统偏差的影响,受到感官输入和自上而下的处理的影响.
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